FORCE, MOTION, and Energy REVIEW 2nd Six Weeks CBA Review

What is Friction? Friction is when two surfaces rub against each other It causes things to slow down or stop.

What are things that could increase friction? (slow objects down) Rough surface Dry surface Level surface

What are things that could decrease friction? (Speed Objects up) Smooth surface Wet surface Inclined surface

What does the force of magnetism do? Causes a push or pull between the poles of magnets

What is gravity? The force that pulls objects down towards the Earth

What is inertia? The force that makes a body in motion stay in motion. The force that makes a body at rest, stay at rest.

What is a trial? A single completed investigation Trial 1 Trial 2

Why do you conduct several trials? To see if you get the same results To make sure you your conclusion and/or results are valid

Tool Review 1. Balance 2. Graduated Cylinder 3. Meter stick 4. Spring scale 5. Beaker 6. Hot Plate 7. Thermometer 1. Mass 2. Volume 3. Distance 4. Weight or Force 5. Volume 6. Add Heat 7. Temperature

Distance Blown by the fan (centimeters) Veronica was trying to determine how the surface a toy car rolls on would affect the distance it rolls. She set a fan on low and placed the car on grass and then she placed it on a wooden floor. The table below shows the data she collected. Type of Surface Distance Blown by the fan (centimeters) Trial 1 Trial 2 Trial 3 Average Grass 5.3 5.7 5.5 Wooden 9.8 9.7 9.9 What is the variable?

Distance Blown by the fan (centimeters) Veronica was trying to determine how the surface a toy car rolls on would affect the distance it rolls. She set a fan on low and placed the car on grass and then she placed it on a wooden floor. The table below shows the data she collected. Type of Surface Distance Blown by the fan (centimeters) Trial 1 Trial 2 Trial 3 Average Grass 5.3 5.7 5.5 Wooden 9.8 9.7 9.9 What is being measured?

Distance Blown by the fan (centimeters) Veronica was trying to determine how the surface a toy car rolls on would affect the distance it rolls. She set a fan on low and placed the car on grass and then she placed it on a wooden floor. The table below shows the data she collected. Type of Surface Distance Blown by the fan (centimeters) Trial 1 Trial 2 Trial 3 Average Grass 5.3 5.7 5.5 Wooden 9.8 9.7 9.9 If she turned the fan on high, what would happen?

Remember!!!!!! How does the Variable affect the Measurement?

What are the 5 types of energy? Mechanical Electrical Light Thermal Sound

What does reflect mean? The bouncing of light Remember that light reflects (bounces) off of mirrors Tools: mirrors and smooth shiny surfaces

What does refract mean? The bending of light Remember that light refracts (bends) Tools: lens or other objects light can go through

What does a light ray that is reflected look like?

What does a light ray that is refracted look like?

What is sound? The vibration of molecules Matter must be present for there to be sound

What is the difference between a conductor and an insulator? Conductors allows energy to flow through easily (like metals) Insulators prevent energy from flowing through easily (like cloth)

What is the difference between an open and a closed circuit? Open circuit will NOT work Closed circuit will work

What are the three things a circuit must have in order to work? Power source (Ex: battery) Conductor (Ex: wire) Load: Something to use the electricity (Ex: lamp) Something using electricity Power Source Conductor

What happens in a Series circuit if one light bulb goes out? They all go out

What happens in a parallel circuit if one light bulb goes out? Some stay on

What is thermal energy? Heat energy Example: heat from the sun

What is Mechanical Energy? Moving energy Example: roller coaster

Remember that objects can give off more than one type of energy. Fires give off light energy and thermal energy.

Miscellaneous words you should know Bike Reflector: Geyser: Solar: